Ros Trouble (U2 Error Code) - Oki B6100 Technical Manual

Principles of Operation

ROS Trouble (U2 Error Code)

There are three major causes of U2 errors.
•
Warm-up failure
SOS signal intervals are not shorter than the READY reference value, during three consecutive sam-
plings of the SOS signal interval or within specified seconds after start of warm-up.
•
ROS speed too low (Down Failure)
SOS signal intervals are longer than the set Down Failure interval after completion of warm-up. The
set Down Failure is a time interval corresponding to 90% of the rated ROS Motor speed of rotation.
•
ROS speed too high (Overrun Failure)
SOS signal intervals are shorter than the set Overrun Failure interval after completion of warm-up.
The set Overrun Failure is a time interval corresponding to 102% of the rated ROS Motor speed of
rotation.
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